335.664 grams is the mass of lead in 452 grams of PbCl2.
Step-by-step explanation:
Data given:
mass of lead in PbCl2 = 452 grams
mass of lead =?
atomic mass of PbCl2 = 278.1 grams/mole
atomic mass of Pb = 207.2 grams/mole
atomic mass of chlorine = 35.45 grams/mole
From the chemical formula of PbCl2 it is deduced that 1 mole of lead chloride contains 1 mole of Pb cation and 2 moles of chloride anion
number of moles of PbCl2 provided are:
number of moles =
number of moles = 1.62 moles of PbCl2 is provided
so when 1 mole of PbCl2 contains 1 mole of lead
then 1.62 moles of PbCl2 will have 1.62 moles of lead
mass = atomic mass x number of moles
mass of lead = 1.62 x 207.2
mass of lead = 335.664 grams
335.664 grams of lead is present in a sample of lead chloride having mass of 452 grams.